Scientific Visualisation Made Easy
Vivid3D is a C++ IDE/3D engine, with python scripting.
Generate Harmonious Colors Freely.
image editor
Free yourself
Tools for reading the track data of the project "Leave a Trace"
Free drawing software for Windows, Mac OS X, and Linux
Inkscape extension to add and edit GNUplot graphs
A tool written in Python to draw Splines in MAXONs Cinema 4D